1) 4ab^2 + 16cd
2)5cd - 2a^2
3) 4ab + 6ad = 2a (2b + 3d)
4) ax + bx + ay + by = (ax + bx) + (ay +by) = x (a+b) + y (a +b)
5) (a+b) (x-y-z)
В приложении ...........